Cylinder switch with no-voltage or overflow-current release



Oct. 27, 1925 R. T. BAR ET AL. CYLINDER SWITCH WITH NO VOLTAGE 0R OVERFLOI CURRENT IBLBASB Filed Aug. 29. 1921 Patented Oct. 27, 1925.

UNITED STATES PATENT OFFICE.

REINHARDT THEODOR BAR AND KARL BdLTE, 0F FRANKFORT-ON-THE-MAIN, GER- MANY, ASSIGNORS TO THE FIRM VOIGT & HAEFFNER, AKTIENGESELLSCHAFT, OF

FRANKFORT-ON-THE-MAIN, GERMANY.

CYLINDER SWITCH WITH NO-VOLTAGE OR OVERFLOW-CURRENT RELEASE.

Application filed August 29, 1921.

To all whom it may concern.

Be it known that we, REINHARDT THEODOR BAR, a citizen of the Republic of Germany, and KARI. Bonn, a citizen of the Republic of Germany, and residents of Frankfort-onthe-Main, Hanauerlandstrasse 152/158, have invented certain new and useful Improvements in Cylinder Switches with No- Voltage or Overflow-Current Release (for which I have filed applications in Germany on March 3, 1917, and July 24, 1919), of which the following is a specification.

In order to permit that in cylinder switches, without enlargement of the casing, releasing devices for overflow current release or for no voltage release be arranged, the switching-0d of the current is effected, according to the arrangement which forms the object of this invention, in a manner known by itself, ata separate part of the cylinder which is not directly driven from the switch shaft and which is rotated only for the angle'which is necessary for the switching-off. In this manner a very simple arrangement for the transmission of the movement from the switch-shaft upon the switching-01f cylinder is obtained. This transmission is effected according to the invention, by means of an irregular disk mounted upon the switch shaft and of a roller through the intermediary of a rocking lever which is coupled in any convenient manner with the switching off cylinder.

In order that the invention may be clearly understood, we shall proceed to describe the same with reference to the two forms of construction of a cylinder switch shown by way of example in the accompanying drawing, wherein c Fig. 1 shows in side elevation a form of construction in which a no-voltage magnet is used.

Figs. 2, 3 and 4 show in plan view three different switch positions, the switched-off position (Fig. 2), the switching-on position (Fig. and the position at the moment of the releasing by the outwardly situated magnet (Fig. 4).

Figs. 5 to 8 illustrate the second form of construction in plan view, the switch being shown in four switch positions, viz in the switched-off position (Fig. 5), during the switching-on movement (Fig. 6), at the Serial No. 496,664.

switched-on position (Fig. 7) and in the switched-off position (Fig. 8).

In the form of construction shown on Figs. 14 the hand wheel a upon whose shaft 1) the cam 0 is keyed serves for operating the switch. The cam 0 acts upon a roller (Z which is rotatably mounted in the rocking lever e. The spring 9 is attached with one end to the rocking lever e pivotably mounted upon a support f and with the opposite end to the casing of the cylinder switch, not shown in the drawings. A link It connected with the rocking lever 6 serves to transmit the movements to the pawl lock 2' which consists of a frame fixed to shaft b and having mounted therein a series of pawl latches, as clearly shown by dotted lines in Figures 2, 3 and 4. The last pawl 7c of said lock is connected with the switching oft cylinder 91. (Fig. 1) by a stud Z which is adapted to move in the slit m of the lock. The cylinder a can freely rotate around the main shaft Z). 0 is the blade spring for switching off the part '11 of the cylinder 2) is the releasing pawl, Q the outwardly arranged no-voltage magnet with its armature 1".

In the switching-off position (Fig. 2) the cylinder at is coupled with the look i by stud Z and pawl It so that it is in engagement with the hand wheel a. The armature v" of the magnet q is not attracted by the magnet. When the shaft Z) rotates counterclockwise the cam c is rotated also, whereby the roller (Z and the rocking lever c are swung outward so that the spring (7 is put under tension. The lock 71 moves with the rocking lever through the intermediary of link it and the cylinder n is drawn along by means of stud Z. As soon as the circuit is closed upon the cylinder at the magnet q is excited and attracts its armature 0'. After a partial rotation of the hand wheel a the position shown by Fig. 3 has been reached. If new the voltage fails in this position of the switch, the magnet g releases its armature 9* which strikes against the releasing pawl 79 so that the lock is released and the cylinder at returns to the switching-off position (Fig. 4) through the action of the switching-oft spring 0. At the return movement of the hand wheel the spring 9' draws the rocking lever 6 towards the cam and through the same the lock 2' until the coupling between 73 and Z can be effected, this position being shown on Fig. 2.

lfthe releasing pawl of the lock is curved so that its curvature corresponds with that of the cylinder the armature of the outside releasing magnet can operate the releasing pawl by shock within the angle which'is necessary for the switching-off.

The form of construction shown on Figs. 5-8 differs from the form of construction which has just been described with reference to Figs. 14 by greater simplicity in so far as instead of the-centrally. arranged pawl lock e', the part a of the switch which has to be operatedis directly coupled with the rocking levere, so that this part a is coupled with an element situated at the outside of the switch and which does not participate in the rotating movement.

On the drawing Fig. 5 shows the arrangement in thenormal position of rest. a des ignates the handle or a hand wheel which is rigidly connected with the shaft 5 and which is adapted to act directly upon the roller (Z of the rocking lever e by means of the cam 0. A levers is hingedly connected with the rocking lever e and coupled at z with the part a move. ly mounted in shaft 7). The spring 0 serves to return the part a to the switching-off position. lVhcn the hand wheel a is turned counter-clockwise the cam 0' presses upon the roller (Z and pushes the same to the left so that the other end of the rocking lever c is raised and ro tates the part n1 owing to it being coupled with the same 6), until the roller (Z gets upon the circular part of the cam disk 0. At this moment the part a has established the contact for the switching in and it remains in this position, independently of the further revolution of the controller connected with the hand wheel a 7). When the controller has to be switched off it is inereiy necessary to release the coupling between t andn whereupon part a returns at once to the initial position (Fig. 8). The releasing of the coupling can be efiected also in this case by the armature of a no-voltage magnet or the like.

W e claim 1. In an electromagnetic switch, a switch shaft, a switch member rotatable on said shaft, a cam fixed on said shaft, a rocking lever having a relatively stationary fulcrum operated by said cam, releasable connections between said rocking lever and switch member, a relatively stationary electromagnet controlling said connections and means for biasing said switch member to open-circuit position.

2. In an electromagnetic switch, a switch shaft, a switch member rotatable on said shaft, a spring biasing said member to open circuit position, a cam fixed on said shaft, a rocking lever operated by said cam, means including a latch for connecting said rocking lever to said member, and an electromagnet for actuating said latch to disconnect said rocl: arm and member.

8. In an electromagnetic switcln'a switch shaft, switch cylinder rotatable on said shaft, a spring biasing said cylinder to open-circuit position, a cam fixed on said shaft, a rocking lever operated by said cam, means including a latch for connecting said rocking lever to said cylinder, and an new tromagnet operating when deenergized to actuate said latch and release said cylinder.

i. In an electromagnetic switch, a switch shaft, a switch cylinder rotatable on'said shaft, a spring biasing said cylinder to open-circuitposition, a cam fixed on said shaft, a rocking lever having a relatively stationary fulcrum, a roller on said lever coacting with said cam, a support fixed to said shaft, a connection between said support and rocking lever, a plurality of concatenated pawls mounted on said support, a pin rigid with said cylinder, the last of said latches being engaged with said pin and the first of said latches having a tailcurved substantially concentric with said shaft, and a relatively stationary magnet having an armature adapted to engage said curved tail.

5. In an electromognetically. operated cylinder switch, a manually operable switch shaft, a switch member biased toopen-circuit position rotatably mounted on said shaft, means including a latch for connecting said shaft and switch member for rotation. together, and a relatively stationary. .magnet for actuating said latch.

6. In an electromagnetically operatedcylinder switch, a manually operable switch shaft, a switch cylinder rotatable on said shaft and biased to open-circuit. position, means including a latch fixed to said shaft and a pin rigid with said cylinder connecting said shaft and cylinder, and a relatively stationary ma 'net adapted to actuate said latch to disconnect said cylinder.

In testimony whereof we affix our signat-ures.

nnrnnann'r Tnnonon BAR. KARL nor'rn. 

